Cam/Impeller selection help
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Cam/Impeller selection help

  1. #1
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    Default Cam/Impeller selection help

    Recently acquired a 1973 Taylor SS 18" with a JE that needs rebuild. With the boat rest I don't have the money to go bronze or SS impeller right now. The motor is a 460 with -7cc pistons and D3ve heads. Should be about 9:1 compression according to the calculator. I need a hydraulic tappet cam suggestion as well as a good impeller size recommendation for the cam. I will be opening up the exhaust side of the heads with some port/polishing soon. Running logs thru transom, 850 dp carb, and Ford Racing intake pn: m-9424-g429. No place diverter.

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    Senior Member johnf's Avatar
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    Default custom cam

    Call Scotty Johnson at RHP. He can hook you up with a custom cam for very little more than an off the shelf cam. He knows FORD's!!! His #(253)988-6648

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    Straub was also suggested but I'm not sure on his pricing yet. His website says around 600 which can't be right

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    Senior Member jetjunky's Avatar
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    A quality alum. impeller will be just fine for your power range unless you plan to dredge with it or shock load it excessively.

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    ill be running an A or AB impeller.

    I need cam help though. Ive spoken to several guys that all recommend completely different things to me. Ive heard to skip the comp marine cams and go to the High Energy or Dual Energy series because the marine cam is just designed to idle smoother for v drive boats. Something around 220/230 range duration at .050 seems to be the suggested duration by more than one person. This puts up Lunati, Comp cams, and maybe bullett cams for consideration. I would like to stick with COMP or Lunati. Lunatic makes a 219/227 @ .050. And Comp makes a few cams around that spec but in different series. Which series am i best suited with? I have low compression as it is at 8.5:1 or so and an aluminum impeller limits out around 5000-5500 rpm

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    Senior Member bc18's Avatar
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    Quote Originally Posted by DieseLife View Post
    ill be running an A or AB impeller.

    I need cam help though. Ive spoken to several guys that all recommend completely different things to me. Ive heard to skip the comp marine cams and go to the High Energy or Dual Energy series because the marine cam is just designed to idle smoother for v drive boats. Something around 220/230 range duration at .050 seems to be the suggested duration by more than one person. This puts up Lunati, Comp cams, and maybe bullett cams for consideration. I would like to stick with COMP or Lunati. Lunatic makes a 219/227 @ .050. And Comp makes a few cams around that spec but in different series. Which series am i best suited with? I have low compression as it is at 8.5:1 or so and an aluminum impeller limits out around 5000-5500 rpm
    Comp is a great choice. I would consider staying away from a flat tappet deal. I know its a budget deal but there's some things I'll spend a little more on for reliability and performance.

    You can spin an aluminum impeller more that the rpm you posted.

  9. #7
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    pump - AB would be the largest impeller I would run, I have a Taylor SJ and its getting a B, aluminum will work just fine, the JE is an economy pump not a race deal, some guys put a spilt bowl on that pump which allows wedges and not the odd ball diverter, you can find used diverters for a split bowl fairly easy, every blue moon you can find the electric jetovator setup for the JE, you will be happy with a diverter/jetovator but not a must right away, I ran mine as a straight shooter for a little while and it did ok...went across the water, also it should have a ride plate.

    When you get to working on those heads you can clean up the pump a little also.
    Good luck with the logs, several of us have been fighting them for years. The best ones to have are the bolt thru logs, I had Indmar logs, pain to install and remove, wrench only...little turn...little turn...and they don't seal for crap.

    As far as cam, in my Ford I ran a hydraulic Comp Cam, their website is pretty good about breaking down Jet boat with different impellers, however you can get with Straub to get you a better cam that will help. I just got one of the website years ago. You can get the sound and idle you desire along with some performance. I just went with a run of the mill deal. Depends on what you do on the water...cruise around...little skiing...hammer down a bit...etc

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    Member Waterslinger's Avatar
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    Lots of time playing with a E pump and a 460. For that simple combo a 270 H will work good. Run a A imp and get a inducer if you can.
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    Senior Member copterzach's Avatar
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    U got to go with a 3/4 race cam or an RV cam!! They are the most popular on Craigslist! All kidding aside, there is lots of knowledge here.


    Aggie class of '97. WHOOP

  12. #10
    Seriously off center slowride's Avatar
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    I ran a similar setup with great results. 18' Advantage open bow with an "E" pump, 460 (stock bottom end), Weiand Stealth, Comp Cams 280H cam, D3 heads, 850DP, "A" impeller, Harman long bolts, HiTech shoe and ride plate, and loader. No porting at all and it consistently ran low 70's.






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